257643002 has 32 divisors (see below), whose sum is σ = 418279680. Its totient is φ = 118635840.

The previous prime is 257642993. The next prime is 257643011. The reversal of 257643002 is 200346752.

It is an interprime number because it is at equal distance from previous prime (257642993) and next prime (257643011).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322868 + ... + 323664.

It is an arithmetic number, because the mean of its divisors is an integer number (13071240).

Almost surely, 2^257643002 is an apocalyptic number.

257643002 is a deficient number, since it is larger than the sum of its proper divisors (160636678).

257643002 is a wasteful number, since it uses less digits than its factorization.

257643002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 257643002 is about 16051.2616949572. The cubic root of 257643002 is about 636.3159121056.

Adding to 257643002 its reverse (200346752), we get a palindrome (457989754).

The spelling of 257643002 in words is "two hundred fifty-seven million, six hundred forty-three thousand, two".